code: def get_full_text(text_blocks):
      full_text = ""
      prev_block = None
      for block in text_blocks:
          if prev_block:
              full_text += block_separator(
                  prev_block.text,
                  block.text,
                  prev_block.block_type,
                  block.block_type,
              )
          else:
              full_text += block.text
          prev_block = block
      return full_text
  
file_path: pdf-to-markdown/marker/markdown.py
imports: from marker.schema import MergedLine, MergedBlock, FullyMergedBlock, Page
  import re
  from typing import List
label_desc: Use image node_id 7 for calling a global function with example usage: get_full_text(text_blocks) and returns: full_text